The sleeper group influences on lateral resistance and stability of ballast bed

IF 3.4 2区工程技术 Q2 TRANSPORTATION SCIENCE & TECHNOLOGY

International Journal of Rail Transportation Pub Date : 2022-07-27 DOI:10.1080/23248378.2022.2106318

Yi Xu, Jie-ling Xiao, Tianheng Jiang, Liyuan Zhuang, Pu-Han Jing, Ping Wang, Tianyou Qi

引用次数: 1

Abstract

ABSTRACT The sleeper group, composed of a certain number of rail sleepers, influences the characterization of lateral resistance and the stability of continuous welded rail (CWR). According to full-scale model tests and discrete element model simulation tests of ballast bed, we established a new lateral stability analysis model of CWR considering the effect of sleeper group and resistance sharing characteristics, and compared it with the traditional model. The case analysis shows that the lateral stability analysis result of CWR is safer when considering the effect of sleeper group. When the curve radius is 300 m, the safety margin of the sleeper group model is about 20.8% larger than that of the traditional model. For CWR with potential large lateral displacement in special sections (such as small-radius and large temperature difference), it is advisable to consider the effect of sleeper group for the lateral stability analysis.

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轨枕组对压载床的横向阻力和稳定性有影响

轨枕组由一定数量的轨枕组成，影响着无缝线路的横向阻力特性和稳定性。通过道床全尺寸模型试验和离散元模型仿真试验，建立了考虑轨枕组和阻力分担特性影响的无缝线路横向稳定性分析新模型，并与传统模型进行了比较。实例分析表明，考虑轨枕群的影响，无缝线路的横向稳定性分析结果较为安全。当曲线半径为300m时，轨枕组模型的安全裕度比传统模型大20.8%左右。对于特殊地段（如小半径、大温差）可能存在较大横向位移的无缝线路，建议在横向稳定性分析中考虑轨枕组的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Rail Transportation TRANSPORTATION SCIENCE & TECHNOLOGY-

CiteScore

6.90

自引率

15.00%

发文量

期刊介绍： The unprecedented modernization and expansion of rail transportation system will require substantial new efforts in scientific research for field-deployable technologies. The International Journal of Rail Transportation (IJRT) aims to provide an open forum for scientists, researchers, and engineers in the world to promote the exchange of the latest scientific and technological innovations in rail transportation; and to advance the state-of-the-art engineering and practices for various types of rail based transportation systems. IJRT covers all main areas of rail vehicle, infrastructure, traction power, operation, communication, and environment. The journal publishes original, significant articles on topics in dynamics and mechanics of rail vehicle, track, and bridge system; planning and design, construction, operation, inspection, and maintenance of rail infrastructure; train operation, control, scheduling and management; rail electrification; signalling and communication; and environmental impacts such as vibration and noise. The editorial policy of the new journal will abide by the highest level of standards in research rigor, ethics, and academic freedom. All published articles in IJRT have undergone rigorous peer review, based on initial editor screening and anonymous refereeing by independent experts. There are no page charges and colour figures are included in the online edition free of charge.